# encryptPropertySource

**Repository Path**: hell-hope/encrypt-property-source

## Basic Information

- **Project Name**: encryptPropertySource
- **Description**: 加密springboot配置文件
- **Primary Language**: Unknown
- **License**: Not specified
- **Default Branch**: master
- **Homepage**: None
- **GVP Project**: No

## Statistics

- **Stars**: 0
- **Forks**: 0
- **Created**: 2023-07-10
- **Last Updated**: 2023-08-11

## Categories & Tags

**Categories**: Uncategorized

**Tags**: None

## README

# 加密配置文件

## 定义一个解密的接口
```kotlin

interface IEncryptPropertySourceLoader {

    fun decrypt(resource: Resource) : Resource {
        val key = "MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDRjQ11x4LOjpUUxamG1T0lQFPXjjQ1YImxalXl7zNSPrAjWc2cAJiq69WNf7Dh6M6/U+p7aFosDxXX76LdyCPkQp3vWUftYSZuXKph0D6WRSVNGHutTKXsGS62/1RGCXV3vhcl/GwQeqYCp3iHsD+Lu9NoDWPgFXa+JJGSPvBuLwIDAQAB"
        val keyFactory = KeyFactory.getInstance("RSA")
        val keyArray = Base64.getDecoder().decode(key)
        val keySpec = X509EncodedKeySpec(keyArray)
        val keyGenerate = keyFactory.generatePublic(keySpec)

        //1.创建cipher对象
        val cipher = Cipher.getInstance("RSA")
        //2.初始化cipher
        cipher.init(Cipher.DECRYPT_MODE, keyGenerate)
        val decryptMaxSize = 128 //解密：每次最大加密长度
        val byteArray = Base64.getDecoder().decode(resource.inputStream.readBytes())
        var offset = 0 //当前偏移的位置

        val bos = ByteArrayOutputStream()
        while (offset < byteArray.size) { //没加密完
            //每次最大解密128个字节
            var temp: ByteArray
            if (byteArray.size - offset >= decryptMaxSize) {
                temp = cipher.doFinal(byteArray, offset, decryptMaxSize)
                //重新计算偏移的位置
                offset += decryptMaxSize
            } else {
                //加密最后一块
                temp = cipher.doFinal(byteArray, offset, byteArray.size - offset)
                //重新计算偏移的位置
                offset = byteArray.size
            }
            //存储到临时缓冲区
            bos.write(temp)
        }
        bos.close()
        return ByteArrayResource(bos.toByteArray())
    }
    
}
```

## 继承 PropertiesPropertySourceLoader 类重写父类的方法
```kotlin
class PropertiesEncryptPropertySourceLoader : PropertiesPropertySourceLoader(), IEncryptPropertySourceLoader {

    override fun getFileExtensions(): Array<String> {
        return arrayOf("properties.encrypt")
    }

    @Throws(IOException::class)
    override fun load(name: String, resource: Resource): List<PropertySource<*>?>? {
        return super.load(name, decrypt(resource))
    }

}
```

## 继承 YamlEncryptPropertySourceLoader 类重写父类的方法
```kotlin
class YamlEncryptPropertySourceLoader : YamlPropertySourceLoader(), IEncryptPropertySourceLoader {

    override fun getFileExtensions(): Array<String> {
        return arrayOf("yaml.encrypt", "yml.encrypt")
    }

    override fun load(name: String?, resource: Resource): MutableList<PropertySource<*>> {
        return super.load(name, decrypt(resource))
    }

}
```

## 在 resources 文件夹添加文件 META-INF/spring.factories
### 指定PropertySourceLoader类
```text
org.springframework.boot.env.PropertySourceLoader=\
PropertiesEncryptPropertySourceLoader,\
YamlEncryptPropertySourceLoader
```